Product Description

LVBoost is a boost converter that can
take voltages as low as 0.5V and convert them into higher, more useful
voltages like 3.3V or 5V. It has an exceptionally low quiescent draw -
typically under .4mA. these features make LVBoost a great choice for
powering projects from solar or other renewable energy sources.

From a 3V input, 500mA at 5V out is easily achievable, allowing you
to charge nearly any portable device that meets the USB spec.

The output voltage is set with a small screw potentiometer on the
side of the LVBoost.